feat: Add SHZ log inspection and HighGo database querying capabilities

- Introduced `inspect-shz-logs` skill for inspecting local and production logs with bounded read-only commands.
- Added `view.sh` script for log viewing with options for following logs and filtering by keywords.
- Created `query-shz-highgo` skill for querying the SHZ HighGo database through an SSH gateway.
- Implemented read-only SQL execution with strict controls on allowed statements and query structure.
- Added new domain and mapper classes for managing outdoor fair job associations.
- Enhanced `OutdoorFairController` to support job listing and management for outdoor fairs.
- Created SQL scripts for initializing outdoor fair job data and managing menu visibility.

.claude/skills/query-shz-highgo/SKILL.md

@@ -0,0 +1,42 @@
+---
+name: query-shz-highgo
+description: Query the SHZ HighGo Security Enterprise Edition database through its SSH gateway using a guarded read-only psql workflow. Use when Claude Code is working in the shz-backend project and needs to inspect database schemas, tables, columns, row counts, or application data; diagnose data-related behavior; or execute SELECT, WITH, SHOW, or EXPLAIN statements against the project's HighGo database.
+---
+
+# Query SHZ HighGo
+
+Use the bundled script to run read-only SQL through the configured SSH gateway.
+
+## Query workflow
+
+1. Form the narrowest useful query. Add a small `LIMIT` when inspecting rows.
+2. For unfamiliar tables, inspect `information_schema.columns` before selecting business data.
+3. Run:
+
+   ```bash
+   .claude/skills/query-shz-highgo/scripts/query.sh 'SELECT current_database(), current_user, current_schema()'
+   ```
+
+4. Summarize the result and distinguish returned facts from inferences.
+
+The script accepts only statements beginning with `SELECT`, `WITH`, `SHOW`, or `EXPLAIN`, rejects multiple statements, sets `search_path` to `shz,public`, enforces database-level read-only mode, and applies a 30-second timeout. Never bypass these controls or perform writes unless the user explicitly requests a separate write-capable workflow.
+
+## Schema discovery
+
+List user tables:
+
+```bash
+.claude/skills/query-shz-highgo/scripts/query.sh "SELECT table_schema, table_name FROM information_schema.tables WHERE table_schema NOT IN ('pg_catalog', 'information_schema') ORDER BY 1, 2"
+```
+
+Inspect columns:
+
+```bash
+.claude/skills/query-shz-highgo/scripts/query.sh "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema = 'shz' AND table_name = 'lowercase_table_name' ORDER BY ordinal_position"
+```
+
+HighGo may expose unquoted identifiers in lowercase and quoted identifiers with exact case. Query `information_schema` first when the spelling is uncertain.
+
+## Connection details
+
+Read [references/connection.md](references/connection.md) only when troubleshooting connectivity or updating the endpoint. Do not print, quote, or expose the password file.